Slaklidalen is a valley in Sørkapp Land at Spitsbergen, Svalbard. It has a length of about four kilometers, and is located between Gavrilovfjellet and Brevassfjellet at the western side, and Wiederfjellet and GrÃÂ¥kallen at the east side. Slaklielva flows through the valley on its way from GrÃÂ¥kallbreen to Breinesflya.